画像をバイトコードbyteに変換

import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import javax.imageio.ImageIO;

	
	public static byte[] imageToBytes(Image image, String format) throws IOException {
		BufferedImage bImage = new BufferedImage(image.getWidth(null),
				image.getHeight(null), BufferedImage.TYPE_INT_ARGB);
		Graphics bg = bImage.getGraphics();
		bg.drawImage(image, 0, 0, null);
		bg.dispose();

		ByteArrayOutputStream out = new ByteArrayOutputStream();
		ImageIO.write(bImage, format, out);
		return out.toByteArray();
	}
	
	public static byte[] imageToBytes(String path) throws IOException {
		InputStream inputStream = new FileInputStream(path);
		BufferedInputStream in = new BufferedInputStream(inputStream);
		ByteArrayOutputStream out = new ByteArrayOutputStream(1024);

		byte[] temp = new byte[1024];
		int size = 0;
		while ((size = in.read(temp)) != -1) {
			out.write(temp, 0, size);
		}
		in.close();
		byte[] content = out.toByteArray();
		return content;
	}